Yep. Mono works great.
There are a few issues experienced by the few people who do not tolerate powders well ...who tend to cramp. They should generally use lower doses and build up.
I know some people who used too much every dose and experience gut discomfort..even a loading dose (20 grams-about 4 teaspoons) can do this for some people.
There are a few people who have either a low % of type 2 muscle or a high amount of phosphocreatine in their system who feel they are "non-responders."
After 6 weeks off any Creatine product, If you journal your training, you notice changes in your recovery and training intensity.
Other than that, you don't actually "feel" anything from creatine...other than feeling bigger.
Ever wonder how much 2-8 pounds of water is? Weigh it! thats about how much extra you have in your muscle from the creatine.
Muscle
IS roughly 75% water! That means you have more muscle.
Then there are other interesting factors...but I will rant about those later